16x26x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack spl_hgc Maintains humidity in greenhouses with

Maintains humidity in greenhouses with the trays being flooded

Repels and Kills: spider mites

(available in 3K

Hornworms (Manduca sp)

When used in soil

16x26x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack spl_hgc Maintains humidity in greenhouses withNordic Pure Custom MERV 13 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition